<?php
/**
* BaseQuery class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\dao;
/**
* BaseQuery is the base class that represents a SQL SELECT statement in a DBMS-independent way.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class BaseQuery extends \yii\base\Component
{
/**
* @var string|array the columns being selected. This refers to the SELECT clause in a SQL
* statement. It can be either a string (e.g. `'id, name'`) or an array (e.g. `array('id', 'name')`).
* If not set, if means all columns.
* @see select()
*/
public $select;
/**
* @var string additional option that should be appended to the 'SELECT' keyword. For example,
* in MySQL, the option 'SQL_CALC_FOUND_ROWS' can be used.
*/
public $selectOption;
/**
* @var boolean whether to select distinct rows of data only. If this is set true,
* the SELECT clause would be changed to SELECT DISTINCT.
*/
public $distinct;
/**
* @var string|array the table(s) to be selected from. This refers to the FROM clause in a SQL statement.
* It can be either a string (e.g. `'tbl_user, tbl_post'`) or an array (e.g. `array('tbl_user', 'tbl_post')`).
* @see from()
*/
public $from;
/**
* @var string|array query condition. This refers to the WHERE clause in a SQL statement.
* For example, `age > 31 AND team = 1`.
* @see where()
*/
public $where;
/**
* @var integer maximum number of records to be returned. If not set or less than 0, it means no limit.
*/
public $limit;
/**
* @var integer zero-based offset from where the records are to be returned. If not set or
* less than 0, it means starting from the beginning.
*/
public $offset;
/**
* @var string|array how to sort the query results. This refers to the ORDER BY clause in a SQL statement.
* It can be either a string (e.g. `'id ASC, name DESC'`) or an array (e.g. `array('id ASC', 'name DESC')`).
*/
public $order;
/**
* @var string|array how to group the query results. This refers to the GROUP BY clause in a SQL statement.
* It can be either a string (e.g. `'company, department'`) or an array (e.g. `array('company', 'department')`).
*/
public $group;
/**
* @var string|array how to join with other tables. This refers to the JOIN clause in a SQL statement.
* It can either a string (e.g. `'LEFT JOIN tbl_user ON tbl_user.id=author_id'`) or an array (e.g.
* `array('LEFT JOIN tbl_user ON tbl_user.id=author_id', 'LEFT JOIN tbl_team ON tbl_team.id=team_id')`).
* @see join()
*/
public $join;
/**
* @var string|array the condition to be applied in the GROUP BY clause.
* It can be either a string or an array. Please refer to [[where()]] on how to specify the condition.
*/
public $having;
/**
* @var array list of query parameter values indexed by parameter placeholders.
* For example, `array(':name'=>'Dan', ':age'=>31)`.
*/
public $params;
/**
* @var string|BaseQuery[] the UNION clause(s) in a SQL statement. This can be either a string
* representing a single UNION clause or an array representing multiple UNION clauses.
* Each union clause can be a string or a `BaseQuery` object which refers to the SQL statement.
*/
public $union;
/**
* Sets the SELECT part of the query.
* @param string|array $columns the columns to be selected.
* Columns can be specified in either a string (e.g. "id, name") or an array (e.g. array('id', 'name')).
* Columns can contain table prefixes (e.g. "tbl_user.id") and/or column aliases (e.g. "tbl_user.id AS user_id").
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @param string $option additional option that should be appended to the 'SELECT' keyword. For example,
* in MySQL, the option 'SQL_CALC_FOUND_ROWS' can be used.
* @return BaseQuery the query object itself
*/
public function select($columns, $option = null)
{
$this->select = $columns;
$this->selectOption = $option;
return $this;
}
/**
* Sets the value indicating whether to SELECT DISTINCT or not.
* @param bool $value whether to SELECT DISTINCT or not.
* @return BaseQuery the query object itself
*/
public function distinct($value = true)
{
$this->distinct = $value;
return $this;
}
/**
* Sets the FROM part of the query.
* @param string|array $tables the table(s) to be selected from. This can be either a string (e.g. `'tbl_user'`)
* or an array (e.g. `array('tbl_user', 'tbl_profile')`) specifying one or several table names.
* Table names can contain schema prefixes (e.g. `'public.tbl_user'`) and/or table aliases (e.g. `'tbl_user u'`).
* The method will automatically quote the table names unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* @return BaseQuery the query object itself
*/
public function from($tables)
{
$this->from = $tables;
return $this;
}
/**
* Sets the WHERE part of the query.
*
* The method requires a $condition parameter, and optionally a $params parameter
* specifying the values to be bound to the query.
*
* The $condition parameter should be either a string (e.g. 'id=1') or an array.
* If the latter, it must be in one of the following two formats:
*
* - hash format: `array('column1' => value1, 'column2' => value2, ...)`
* - operator format: `array(operator, operand1, operand2, ...)`
*
* A condition in hash format represents the following SQL expression in general:
* `column1=value1 AND column2=value2 AND ...`. In case when a value is an array,
* an `IN` expression will be generated. And if a value is null, `IS NULL` will be used
* in the generated expression. Below are some examples:
*
* - `array('type'=>1, 'status'=>2)` generates `(type=1) AND (status=2)`.
* - `array('id'=>array(1,2,3), 'status'=>2)` generates `(id IN (1,2,3)) AND (status=2)`.
* - `array('status'=>null) generates `status IS NULL`.
*
* A condition in operator format generates the SQL expression according to the specified operator, which
* can be one of the followings:
*
* - `and`: the operands should be concatenated together using `AND`. For example,
* `array('and', 'id=1', 'id=2')` will generate `id=1 AND id=2`. If an operand is an array,
* it will be converted into a string using the rules described here. For example,
* `array('and', 'type=1', array('or', 'id=1', 'id=2'))` will generate `type=1 AND (id=1 OR id=2)`.
* The method will NOT do any quoting or escaping.
*
* - `or`: similar to the `and` operator except that the operands are concatenated using `OR`.
*
* - `between`: operand 1 should be the column name, and operand 2 and 3 should be the
* starting and ending values of the range that the column is in.
* For example, `array('between', 'id', 1, 10)` will generate `id BETWEEN 1 AND 10`.
*
* - `not between`: similar to `between` except the `BETWEEN` is replaced with `NOT BETWEEN`
* in the generated condition.
*
* - `in`: operand 1 should be a column or DB expression, and operand 2 be an array representing
* the range of the values that the column or DB expression should be in. For example,
* `array('in', 'id', array(1,2,3))` will generate `id IN (1,2,3)`.
* The method will properly quote the column name and escape values in the range.
*
* - `not in`: similar to the `in` operator except that `IN` is replaced with `NOT IN` in the generated condition.
*
* - `like`: operand 1 should be a column or DB expression, and operand 2 be a string or an array representing
* the values that the column or DB expression should be like.
* For example, `array('like', 'name', '%tester%')` will generate `name LIKE '%tester%'`.
* When the value range is given as an array, multiple `LIKE` predicates will be generated and concatenated
* using `AND`. For example, `array('like', 'name', array('%test%', '%sample%'))` will generate
* `name LIKE '%test%' AND name LIKE '%sample%'`.
* The method will properly quote the column name and escape values in the range.
*
* - `or like`: similar to the `like` operator except that `OR` is used to concatenate the `LIKE`
* predicates when operand 2 is an array.
*
* - `not like`: similar to the `like` operator except that `LIKE` is replaced with `NOT LIKE`
* in the generated condition.
*
* - `or not like`: similar to the `not like` operator except that `OR` is used to concatenate
* the `NOT LIKE` predicates.
*
* @param string|array $condition the conditions that should be put in the WHERE part.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
* @see andWhere()
* @see orWhere()
*/
public function where($condition, $params = array())
{
$this->where = $condition;
$this->addParams($params);
return $this;
}
/**
* Adds an additional WHERE condition to the existing one.
* The new condition and the existing one will be joined using the 'AND' operator.
* @param string|array $condition the new WHERE condition. Please refer to [[where()]]
* on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
* @see where()
* @see orWhere()
*/
public function andWhere($condition, $params = array())
{
if ($this->where === null) {
$this->where = $condition;
} else {
$this->where = array('and', $this->where, $condition);
}
$this->addParams($params);
return $this;
}
/**
* Adds an additional WHERE condition to the existing one.
* The new condition and the existing one will be joined using the 'OR' operator.
* @param string|array $condition the new WHERE condition. Please refer to [[where()]]
* on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
* @see where()
* @see andWhere()
*/
public function orWhere($condition, $params = array())
{
if ($this->where === null) {
$this->where = $condition;
} else {
$this->where = array('or', $this->where, $condition);
}
$this->addParams($params);
return $this;
}
/**
* Appends a JOIN part to the query.
* The first parameter specifies what type of join it is.
* @param string $type the type of join, such as INNER JOIN, LEFT JOIN.
* @param string $table the table to be joined.
* Table name can contain schema prefix (e.g. 'public.tbl_user') and/or table alias (e.g. 'tbl_user u').
* The method will automatically quote the table name unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* @param string|array $on the join condition that should appear in the ON part.
* Please refer to [[where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
*/
public function join($type, $table, $on = '', $params = array())
{
$this->join[] = array($type, $table, $on);
return $this->addParams($params);
}
/**
* Appends an INNER JOIN part to the query.
* @param string $table the table to be joined.
* Table name can contain schema prefix (e.g. 'public.tbl_user') and/or table alias (e.g. 'tbl_user u').
* The method will automatically quote the table name unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* @param string|array $on the join condition that should appear in the ON part.
* Please refer to [[where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
*/
public function innerJoin($table, $on = '', $params = array())
{
$this->join[] = array('INNER JOIN', $table, $on);
return $this->addParams($params);
}
/**
* Appends a LEFT OUTER JOIN part to the query.
* @param string $table the table to be joined.
* Table name can contain schema prefix (e.g. 'public.tbl_user') and/or table alias (e.g. 'tbl_user u').
* The method will automatically quote the table name unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* @param string|array $on the join condition that should appear in the ON part.
* Please refer to [[where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query
* @return BaseQuery the query object itself
*/
public function leftJoin($table, $on = '', $params = array())
{
$this->join[] = array('LEFT JOIN', $table, $on);
return $this->addParams($params);
}
/**
* Appends a RIGHT OUTER JOIN part to the query.
* @param string $table the table to be joined.
* Table name can contain schema prefix (e.g. 'public.tbl_user') and/or table alias (e.g. 'tbl_user u').
* The method will automatically quote the table name unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* @param string|array $on the join condition that should appear in the ON part.
* Please refer to [[where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query
* @return BaseQuery the query object itself
*/
public function rightJoin($table, $on = '', $params = array())
{
$this->join[] = array('RIGHT JOIN', $table, $on);
return $this->addParams($params);
}
/**
* Sets the GROUP BY part of the query.
* @param string|array $columns the columns to be grouped by.
* Columns can be specified in either a string (e.g. "id, name") or an array (e.g. array('id', 'name')).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return BaseQuery the query object itself
* @see addGroup()
*/
public function group($columns)
{
$this->group = $columns;
return $this;
}
/**
* Adds additional group-by columns to the existing ones.
* @param string|array $columns additional columns to be grouped by.
* Columns can be specified in either a string (e.g. "id, name") or an array (e.g. array('id', 'name')).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return BaseQuery the query object itself
* @see group()
*/
public function addGroup($columns)
{
if (empty($this->group)) {
$this->group = $columns;
} else {
if (!is_array($this->group)) {
$this->group = preg_split('/\s*,\s*/', trim($this->group), -1, PREG_SPLIT_NO_EMPTY);
}
if (!is_array($columns)) {
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
}
$this->group = array_merge($this->group, $columns);
}
return $this;
}
/**
* Sets the HAVING part of the query.
* @param string|array $condition the conditions to be put after HAVING.
* Please refer to [[where()]] on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
* @see andHaving()
* @see orHaving()
*/
public function having($condition, $params = array())
{
$this->having = $condition;
$this->addParams($params);
return $this;
}
/**
* Adds an additional HAVING condition to the existing one.
* The new condition and the existing one will be joined using the 'AND' operator.
* @param string|array $condition the new HAVING condition. Please refer to [[where()]]
* on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
* @see having()
* @see orHaving()
*/
public function andHaving($condition, $params = array())
{
if ($this->having === null) {
$this->having = $condition;
} else {
$this->having = array('and', $this->having, $condition);
}
$this->addParams($params);
return $this;
}
/**
* Adds an additional HAVING condition to the existing one.
* The new condition and the existing one will be joined using the 'OR' operator.
* @param string|array $condition the new HAVING condition. Please refer to [[where()]]
* on how to specify this parameter.
* @param array $params the parameters (name=>value) to be bound to the query.
* @return BaseQuery the query object itself
* @see having()
* @see andHaving()
*/
public function orHaving($condition, $params = array())
{
if ($this->having === null) {
$this->having = $condition;
} else {
$this->having = array('or', $this->having, $condition);
}
$this->addParams($params);
return $this;
}
/**
* Sets the ORDER BY part of the query.
* @param string|array $columns the columns (and the directions) to be ordered by.
* Columns can be specified in either a string (e.g. "id ASC, name DESC") or an array (e.g. array('id ASC', 'name DESC')).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return BaseQuery the query object itself
* @see addOrder()
*/
public function order($columns)
{
$this->order = $columns;
return $this;
}
/**
* Adds additional ORDER BY columns to the query.
* @param string|array $columns the columns (and the directions) to be ordered by.
* Columns can be specified in either a string (e.g. "id ASC, name DESC") or an array (e.g. array('id ASC', 'name DESC')).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return BaseQuery the query object itself
* @see order()
*/
public function addOrder($columns)
{
if (empty($this->order)) {
$this->order = $columns;
} else {
if (!is_array($this->order)) {
$this->order = preg_split('/\s*,\s*/', trim($this->order), -1, PREG_SPLIT_NO_EMPTY);
}
if (!is_array($columns)) {
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
}
$this->order = array_merge($this->order, $columns);
}
return $this;
}
/**
* Sets the LIMIT part of the query.
* @param integer $limit the limit
* @return BaseQuery the query object itself
*/
public function limit($limit)
{
$this->limit = $limit;
return $this;
}
/**
* Sets the OFFSET part of the query.
* @param integer $offset the offset
* @return BaseQuery the query object itself
*/
public function offset($offset)
{
$this->offset = $offset;
return $this;
}
/**
* Appends a SQL statement using UNION operator.
* @param string|BaseQuery $sql the SQL statement to be appended using UNION
* @return BaseQuery the query object itself
*/
public function union($sql)
{
$this->union[] = $sql;
return $this;
}
/**
* Sets the parameters to be bound to the query.
* @param array $params list of query parameter values indexed by parameter placeholders.
* For example, `array(':name'=>'Dan', ':age'=>31)`.
* @return BaseQuery the query object itself
* @see addParams()
*/
public function params($params)
{
$this->params = $params;
return $this;
}
/**
* Adds additional parameters to be bound to the query.
* @param array $params list of query parameter values indexed by parameter placeholders.
* For example, `array(':name'=>'Dan', ':age'=>31)`.
* @return BaseQuery the query object itself
* @see params()
*/
public function addParams($params)
{
if ($params !== array()) {
if ($this->params === null) {
$this->params = $params;
} else {
foreach ($params as $name => $value) {
if (is_integer($name)) {
$this->params[] = $value;
} else {
$this->params[$name] = $value;
}
}
}
}
return $this;
}
/**
* Merges this query with another one.
*
* The merging is done according to the following rules:
*
* - [[select]]: the union of both queries' [[select]] property values.
* - [[selectOption]], [[distinct]], [[from]], [[limit]], [[offset]]: the new query
* takes precedence over this query.
* - [[where]], [[having]]: the new query's corresponding property value
* will be 'AND' together with the existing one.
* - [[params]], [[order]], [[group]], [[join]], [[union]]: the new query's
* corresponding property value will be appended to the existing one.
*
* In general, the merging makes the resulting query more restrictive and specific.
* @param BaseQuery $query the new query to be merged with this query.
* @return BaseQuery the query object itself
*/
public function mergeWith(BaseQuery $query)
{
if ($this->select !== $query->select) {
if (empty($this->select)) {
$this->select = $query->select;
} elseif (!empty($query->select)) {
$select1 = is_string($this->select) ? preg_split('/\s*,\s*/', trim($this->select), -1, PREG_SPLIT_NO_EMPTY) : $this->select;
$select2 = is_string($query->select) ? preg_split('/\s*,\s*/', trim($query->select), -1, PREG_SPLIT_NO_EMPTY) : $query->select;
$this->select = array_merge($select1, array_diff($select2, $select1));
}
}
if ($query->selectOption !== null) {
$this->selectOption = $query->selectOption;
}
if ($query->distinct !== null) {
$this->distinct = $query->distinct;
}
if ($query->from !== null) {
$this->from = $query->from;
}
if ($query->limit !== null) {
$this->limit = $query->limit;
}
if ($query->offset !== null) {
$this->offset = $query->offset;
}
if ($query->where !== null) {
$this->andWhere($query->where);
}
if ($query->having !== null) {
$this->andHaving($query->having);
}
if ($query->params !== null) {
$this->addParams($query->params);
}
if ($query->order !== null) {
$this->addOrder($query->order);
}
if ($query->group !== null) {
$this->addGroup($query->group);
}
if ($query->join !== null) {
if (empty($this->join)) {
$this->join = $query->join;
} else {
if (!is_array($this->join)) {
$this->join = array($this->join);
}
if (is_array($query->join)) {
$this->join = array_merge($this->join, $query->join);
} else {
$this->join[] = $query->join;
}
}
}
if ($query->union !== null) {
if (empty($this->union)) {
$this->union = $query->union;
} else {
if (!is_array($this->union)) {
$this->union = array($this->union);
}
if (is_array($query->union)) {
$this->union = array_merge($this->union, $query->union);
} else {
$this->union[] = $query->union;
}
}
}
return $this;
}
}